تقرير
Description of turbulent dynamics in the interstellar medium: Multifractal microcanonical analysis: II. Sparse filtering of Herschel observation maps and visualization of filamentary structures at different length scales
| العنوان: | Description of turbulent dynamics in the interstellar medium: Multifractal microcanonical analysis: II. Sparse filtering of Herschel observation maps and visualization of filamentary structures at different length scales |
|---|---|
| المؤلفون: | Rashidi, A., Yahia, H., Bontemps, S., Schneider, N., Bonne, L., Hennebelle, P., Scholtys, J., Attuel, G., Turiel, A., Simon, R., Cailly, A., Zebadua, A., Cherif, A., Lacroix, C., Martin, M., Aouni, A. El, Sakka, C., Maji, S. K. |
| المصدر: | Astronomy & Astrophysics 2024 |
| سنة النشر: | 2024 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Astrophysics of Galaxies |
| الوصف: | We present significant improvements to our previous work on noise reduction in {\sl Herschel} observation maps by defining sparse filtering tools capable of handling, in a unified formalism, a significantly improved noise reduction as well as a deconvolution in order to reduce effects introduced by the limited instrumental response (beam). We implement greater flexibility by allowing a wider choice of parsimonious priors in the noise-reduction process. More precisely, we introduce a sparse filtering and deconvolution approach approach of type $l^2$-$l^p$, with $p > 0$ variable and apply it to a larger set of molecular clouds using {\sl Herschel} 250 $\mu $m data in order to demonstrate their wide range of application. In the {\sl Herschel} data, we are able to use this approach to highlight extremely fine filamentary structures and obtain singularity spectra that tend to show a significantly less $\log$-normal behavior and a filamentary nature in the less dense regions. We also use high-resolution adaptive magneto-hydrodynamic simulation data to assess the quality of deconvolution in such a simulated beaming framework. Comment: 24 pages, 32 figures, official acceptance date on 16/05/2024 (Astronomy & Astrophysics) |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1051/0004-6361/202346499 |
| URL الوصول: | http://arxiv.org/abs/2406.00893 |
| رقم الأكسشن: | edsarx.2406.00893 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1051/0004-6361/202346499 |
|---|